Basically what the title says. I've seen many people who are very good with the op doing this thing. They shoot and then quickly switch to the knife and then back to the op. What benefits does it have?

I played a match today (Diamond-Ascendant Lobby) where there was a Neon who was so blatantly cheating but despite all our reports and him literally acing our team in 2 seconds, was not banned during the match. It's now been several hours si...